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HFOs EVALUATED AS BLOWING AGENTS FOR EXTRUDED POLYSTYRENE (XPS) INSULATING FOAMS

HFOs EVALUATED AS BLOWING AGENTS FOR EXTRUDED POLYSTYRENE (XPS) INSULATING FOAMS

03.10.2014

Various HFOs have been evaluated as replacement for HFC-134a as blowing agents for XPS (extruded polystyrene) insulating foams.

From the five different HFOs tested, HFO-1234zeE, the only one to be produced at an industrial scale, gave excellent results, when mixed with co-blowing agents in order to keep a good foam structure.

Non commercial HFO-1261zf (CH2=CH-CH2F), and HFO-1243zf (CH2=CH-CF3), in combination with co-blowing agents, gave also good results.

Source : Sage Journals – Journal of Cellular Plastics